Conceptual Physics (12th Edition)

by
Hewitt, Paul G.

Published by
Addison-Wesley

ISBN 10:
0321909100

ISBN 13:
978-0-32190-910-7

Chapter 21 - Think and Explain: 65

Answer

440 Hz. 660 Hz.

Work Step by Step

As seen on page 395 and in Figure 21.5, the second harmonic is at two times the fundamental frequency, or $2 f_{o} = (2)(220 Hz) = 440 Hz$.
The third harmonic is at three times the fundamental frequency, or $3 f_{o} = (3)(220 Hz) = 660 Hz$.
The fourth harmonic is at four times the fundamental frequency, or $4 f_{o}$, and so on.